This has to be one of the best arcade shooters on iOS. The graphics are gorgeous and the game runs smoothly without lag or crashing even on my iPod touch 2G! The level design is clever and great, and by level design I mean the types of enemies and the different ways they spawn. There is excellent background music to listen to, but if you think you will get bored of it, you can play your own music. Even though the weapons seem too similar to the point where i do not see a difference between which weapon to use, This game is still really fun and I would buy it. Im just lucky I got it free while it was available.